Testkit module

[kubukoz]

Hi! It would be nice to have a testing module that'd let you do something like Circe's codec laws.

I'm building something like this for work, I'll see if I can contribute it back here later.

Things I'd like to see in this kind of thing:

• def codingTest[A: XmlEncoder: XmlDecoder](value: A, expectedEncoding: String): Unit
• def roundtripTest[A: Arbitrary: XmlEncoder: XmlDecoder]: Assertion = forAll(...)

It would probably be better to compare the AST instead of strings, though. I suppose currently I can defer to aalto's parser. These would probably help (especially in test land):

• Must have: function that parses String to a XML AST with an Either in the result
• Nice to have: XML interpolator (doesn't need to support symbol interpolations in the beginning, just calling the parser at compile-time would be nice)
• Nice to have: type alias / newtype for the AST type, so that users don't need to find the right import from aalto

Update: I also just realised codingTest would need a way to check equality (in the "value encodes back as expectedEncoding" test) ignoring the missing fields...

[valentiay]

Hi! That would be a great feature, thank you! Ask me, if you have any problems

[kubukoz]

Just noting I'm not using phobos anymore (my previous team is) so I probably won't have time to implement this :(